Have a 03 f150 v8 5.4L with 108k on it that has started shaking pretty good when I hit around 65mph. No CEL or service light but shaking dies off when I level off speed or decelerate. It may or may not have sat for 8 months while I was in Afghanistan depending if you believe my wife started and ran it weekly or not. Any thoughts?

 

Do you feel the shaking in the steering wheel? Is the shaking coming from the front or back of the truck, if you can tell? I would almost think it is suspension related, but its difficult to say for sure. Could be a tire out of balance or even the driveshaft out of balance.

 

It feels as though the whole front end of the truck is shaking but only during acceleration beyond 60mph as soon as I let off gas or maintain speed it stops

 

had the frame and alignment Checked after my truck was rear ended and all checked out.